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Our research-grade gas tube and power supply combination is specifically designed to give optimum intensity and line resolution. Spectrum tube assemblies are commonly used in a variety of spectroscopic applications, ranging from observation to scientific use. When observed through a spectroscope, the emission lines corresponding to the energy transition levels of the gaseous atoms or molecules will appear as distinct components. The spectral output for each tube type can be found in common references such as the Handbook of Chemistry and Physics (CRC Press). One spectrum tube assembly consists of a power supply and interchangeable spectrum tube(s), each sold separately. Power supply (5,000V 10mA max) is 3" L x 4.5" W x 14.5" H and has an on/off switch and 6ft. cord.